Improvement in lead-pencils



T. H. MULLER.

Lead-Pencil.

No. 127,633, Patentedlune 4,1872.

UNITE STATES PATENT QFFICE,

TEILE HENRY MULLER, OF YONKERS, NEWV YORK.

lMPROVEMENT IN LEAD-PENCILS.

To whom it may concern:

Be it known that I, TEILE HENRY MiiLLER, of Yonkers, county ofWestchester, and State of New York, have invented certain new and usefulImprovements in Lead-Pencils, of which the following is a specification:

My invention is an improvement on the invention described and claimed inthe patent of H. L. Lipman of March 30, 1858. The in- Vention of saidLipman consisted of a pencil embracing in the same wooden sheath arubber eraser and a lead core. In this pencil it has been found to bedifficult, if not impracticable, to make, in the cylindrical wooden caseof ordinary pencil size, a cavity of sufficient diameter to hold aproperly-sized piece of rubber without considerable trouble, and alsowithout unduly weakening the wood. To remedy this difficulty theeraser-end of the pencil has been enlarged and thickened in order toallow a large cavity to be made in it, as described in the patent ofJoseph Reckendorfer,

dated November 4, 1862. I have, however, discovered that the difficultyexperienced in the Lipman pencil may be avoided in another way--viz., bymaking the wooden sheath in two parts-the one containing the lead, theother the rubber--and then fitting together and uniting the-two, and.finishing them so that they shall present the appearance of an ordinarywooden pencil. The manner in which this result is'attained will beunderstood by reference to the accompanying drawing, in which Figure 1is a view of the pencil complete, and Fig. 2 is a longitudinal centralsection of the same.

A represents the portion of the wooden sheath in which the lead iscontained, and is made for the most part in the usual manner. B is theportion of the wooden sheath which contains the rubber eraser. These twoparts are made separately. The part B may be made in two parts, groovedand placed together like the part A, or it may be a solid piece of woodbored out cylindrically, but in any case formed so as to have a cavitymuch greater in diameter than that formed in the other part of thepencil for the lead core; and this cavity is intended for the rubbereraser, which, when fitted therein, becomes incased in a wooden sheath.The lower end of the part B is also bored out or grooved to receive atenon formed on one of the ends of the part A. The two parts are ofexactly the same shape and size on their exterior, so that when fittedtogether they may appear to be one and the same piece. After the partsare made and combined with the lead and rubber, as above specified, theyare fitted and glued or, otherwise held together,

and then finished and varnished in a manner well known to pencilmanufacturers, so as to conceal the joint between them, and to presentthe appearance of an ordinary wooden pencil.

In this manner I obtain a pencil of the same size and shape throughoutits length, containing the usual lead core in one end and in the otherend a rubber core far exceeding in size that which it has beenheretofore practicable to use in a Lipman pencil, the two coreslead andrubber-being inclosed in wood, which forms the sheath or case of theencil.

This method of constructing the pencil admits of the employment of aharderwood for the eraser-sheath than need be employed for thepencil-stock proper, and the employment of a harder and tougher wood forthis purpose will, of course, enable me to make the walls of the sheaththinner, thus increasing the capacity of the recess or socket whichholds the eraser.

What I claim, and desire to secure by Letters Patent, is-

A wooden lead-pencil composed of a wooden sheath inclosin g the rubberand a wooden stock inclosin g the lead, when the two are constructedseparately and connected together substantially as shown and set forth.

In testimony whereof I have signed my name to this specification beforetwo subscribing witnesses.

T. H. MULLER. Witnesses:

HENRY SPAMER, IsAAo HURD.

